Gas-heater for cooking



J. S.y HULL Gas Heater for Cooking, te.

"liv" In",

lllllllllllllll r l r N. PETERS Pnoxoumngnpher, wnshmgfon. D. c.

UNITED l STATES PATENT OFFICEO JOHN s. HULL, OE CINCINNATI, OHIO.

GAS-HEATER FOR COOKING, 86C.A

Specification forming part of Letters Patent No. 56,052?, dated July 3,1866.

To all whom it may concern:

Be it known that I, JOHN S. HULL, of Gincinnati, in the county ofHamilton and State of Ohio, have invented a new and Improved CookingApparatus arranged for gasifyin g and burnin gpetroleum, naphtha,benzine, and other carbon liquids; and I do hereby declare that thefollowing is a full and exact' description thereof, reference being hadto the accompanying drawings, making part of this specification- Figurel being a central longitudinal vertical section of the apparatus; Figs.2` and 3, central vertical sections of modified forms of the burner.

Like letters designate corresponding in all of the figures.

The liquid employed is placed in an air-tight vessel or reservoir, A,and is forced therefrom to the burner M by atmospheric pressure,produced by pumping air into the vessel till the desired force ofpressure is obtained, This reservoir A may be of any convenient form,resting on any suitable base or standard, c, and has al device, B, forintroducing the oil, arranged so as to close air-tight and tolet out theover-pressure air when desired.

The pump-barrel D, whether arranged horizontally or vertically in thereservoir, is inclosed by a close tube, C, provided with an extension,c, extending nearly to the top of the reservoir, and open at the upperend, so as to allow a free passage of air into the reservoir, and toexclude the oil or other carboniferous liquid from coming into contactwith the pump. This keeps the pump free lfrom the inconvenience of theliquid in pumping, and prevents any injury which it might do to thevalve or packing.

The pump-barrel is screwed to the reservoir parts so as to be firm andtight, and has a valveseat, g', near its inner end, of conical form,into which fits a valve, H, of rounded or partially-spherical form. Theface of this valve is composed of a piece of cork, la, covered withbuckskin l or equivalent packing surface. Thus constructed, and firmlypressed against the conical valve-seat by a coiled spring, j, around itsstem i, its closes perfectly air-tight, and never fails to retain thepressure of the air over the liquid in the reservoirwhen once obtainedbypumping. There is another guidestem, h, on the outer end ofthe valve,sliding freely through the valve-seat, for a guide. In Order tointroduce the valve into the pumpbarrel between the valveseat g and thevalvediaphragm f, a portion, E, screws upon the main portion at c.

The pump-piston G, having a solid head, packed air-tight at g, is workedin and out the whole length of its rod at each stroke, and when it isdrawn fully out it comes behind an aperture, d, in the side of thebarrel D, through which air from the outside immediately rushes to fillthe vacuum produced therein by drawing the piston back. Y

A tube, m, reaching nearly to the bottom of the reservoir A, conducts'the liquid to the burner. If it is desired to have the burner swinground to any direction, a swivel-joint is made at m', packed andtightened by a screwcap, substantially as shown in Fig. l; but thisjoint maybe in most cases dispensed with.

The iiow of the liquid into the passager, which leads to the burner,must be regulated so as to be limited to a very small amountjust enoughto supply the burner. of regulating this iow is by screwing down aconical stop, u, into the upper end of the duct q, which opens into thepassage r. By screwing this stop fully down the liow may be entirelystopped, as when discontinuing the luse of the apparatus at any time,and by turning it up the liquid is again admitted to the burner, and theamount regulated at pleasure. The screwstop a is packed tightly, so asnot to allow any escape of the liquid along its stem, by a disk, o, ofcork or its equivalent, compressed to any desired degree by screwing acap, p, down upon it. If any additional check to the flow of theliquidis required, a stuffing of line wiregauze is placed in the passage r-asmany thicknesses as necessary.

The passage-tube r leading to the burner may be of any desired length.Upon the outer end of this the burner M is screwed.

The burner has a disk situated over the ilame, and through which thegasgenerating duct s from the passage r leads, and thence down to theconical jet-opening t, directly underneath the disk, substantially asshown in the figures. This disk may be called the burner-retort, sincein it the liquid is gasied by the heat of the flame beneath, and is Themeans heated and rareed to the requisite degree for producing a blowingjet similar to that of a blow-pipe, whereby an intense heat is producedupon the article or substance to be cooked or heated.

The iiame is regulated by a conical point, a, adjustable up in theconical jet-opening t, so as to allow any desired amount of gas toescape or to stop it entirely. This conical jetregulator is adjusted bya screw, F, 'on the lower end of its stem, and turned by a milled head,as represented.

In order lto prevent the escape of any gas down by the regulator-stem, Iemploy a pack ing, u, of asbestus around it, compressed by a screw-cap,substantially as shown in the drawings. Ihe use ot' the asbestus packingis im! portant, since it resists the action of any degree of heat, andany other packing could not withstand the heat of the metal of theburner.

Fig. 2 represents a mod'ication of the arrangement ofthe jet-regulatoruofthe jet-opening by having its stein pass down through and adjusted inthe burner-retort above. In Fig. 3 the burner-retort is represented ashollow, instead of having a single small gas-passage through it.

A cup, x, is employed to hold a few drops of alcohol or othercombustible liquid for generating the rst flow of gas to start theburner With.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. Ilie employment of atmospheric pressure to force the liquid to theburner, in combination with a selfgenerating gas-burner for cooking andheating purposes, so as to produce a blowing `jet of iiame at anydistance from'the reservoir, substantially as herein specified.

2. The gas-generating burner-retort M, constructed and operatingsubstantially as described, in combination with the condensingpump andreservoir for forcing the oil to the retort, for the purposespecied.

3. The air-valve H, having a cork cushion covered with buckskin or itsequivalent, when JOHN S. HULL.

v Witnesses:

- J. S. BROWN,

F. A. FoLLnrT.

